I got this transformer from the circuit used to light the fluorescent tube. the circuit is not good and so i removed the transformer and the 882 transistor which is used to run the transformer. the diagram shows how it was connected. i dont know where to connect the 5th pin. and also dont know what type of transformer is this. somebody please put some light on this. so that i can use this transformer and transistor and light the tube. it was using 6v DC battery. i want to light the tube with two 3.7 lithium ion batteries. please help.

how to connect this autotransformer to light up fluorescent tube using one 882 transistor?

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In general you would place the load across most of (or the entire) winding -- while applying drive to a small segment thereof--- howbeit I feel those resistance readings are 'goofy' for a transformer applied in a 'florescent inverter'...